dateless

/ˈdeɪtlɪs/

Definitions of dateless

1. adjective

   having no known beginning and presumably no end
   “the dateless rise and fall of the tides”

   synonyms: endless, sempiternal

   infinite

   having no limits or boundaries in time or space or extent or magnitude
2. adjective

   of such great duration as to preclude the possibility of being assigned a date
   “dateless customs”

   synonyms:

   undatable

   not capable of being given a date
3. adjective

   not bearing a date
   “a dateless letter”

   synonyms: undated

   undatable

   not capable of being given a date
4. adjective

   unaffected by time
   “few characters are so dateless as Hamlet”

   synonyms: timeless

   unaltered, unchanged

   remaining in an original state